In my post about mercury arc rectifiers used to charge early electric vehicles, I alluded to the competition between gasoline, electricity and steam in the early days of the automobile. Reader Ryoku75 asked “What happened to steam-driven cars?” It’s my task to cover the oddball engine desk here at TTAC and we will be having a report on new engine technologies on display at the SAE World Congress soon enough once I clear some work from my day job off the to-do list, but to answer Ryoku75’s question, it just so happens that there is timely news about steam power. They weren’t at the SAE congress this year, but in recent years a startup called Cyclone Power has displayed their “Rankine Cycle heat regenerative external combustion” engine at the engineers’ convention. If Rankine Cycle heat regenerative external combustion engine is a bit of a mouthful, try “steam engine”.